Serum endotoxin was analysed using the QCL-1000 LAL endpoint assay (Lonza, Allendale, NJ, USA). The assay, and the values given by the manufacturer for intra-assay %CV (3.9 ± 0.46%) and inter-assay %CV (9.6 ± 0.75%), have been validated in our laboratory, as detailed previously [13 (link), 14 (link)].
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